Compare 1811 vs 1993
| Property | 1811 | 1993 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18111 | 19931 |
| Prime factorization | 1811 | 1993 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1811 | 1, 1993 |
| Number of properties | 8 | 10 |
| Additive primes | 149th | |
| Cousin primes (1st member) | 64th | |
| Dihedral primes | 7th | |
| Emirps | 87th | |
| Good primes | 63rd | |
| Harmonic primes | 100th | 112th |
| Isolated primes | 169th | 182nd |
| Long primes | 109th | |
| Primes | 280th | 301st |
| Prime triplets (1st member) | 49th | |
| Pythagorean primes | 146th | |
| Sexy primes (1st member) | 128th | |
| Sexy primes (2nd member) | 127th | |
| Sexy prime triplets (2nd member) | 50th | |
| Sophie germain primes | 56th | |
| Roman numberals | MDCCCXI | MCMXCIII |
| Base 2 | 111000100112 | 111110010012 |
| Base 3 | 21110023 | 22012113 |
| Base 4 | 1301034 | 1330214 |
| Base 5 | 242215 | 304335 |
| Base 6 | 122156 | 131216 |
| Base 7 | 51657 | 55457 |
| Base 8 | 34238 | 37118 |
| Base 9 | 24329 | 26549 |
| Base 10 | 181110 | 199310 |
| Base 11 | 13a711 | 155211 |
| Base 12 | 106b12 | 11a112 |
| Base 13 | a9413 | ba413 |
| Base 14 | 93514 | a2514 |
| Base 15 | 80b15 | 8cd15 |
| Base 16 | 71316 | 7c916 |